Maybe if I start reading now I could actually get to play when it's time for me to retire from my job. Seriously, though I think these categories are too broad to be greatly useful for someone wanting a quick suggestion on what to read. For someone like me, I would like to see a quick bullet point list of what key strategies are included in each book. Something like:
This book is excellent for learning:
- Dealing with Tilt.
- Bluffing.
- Calculating Pot Odds
An it wouldn't be too hard to have a secondary page where you could look up a poker skill and see a list of books related to that skill.
I know most books all cover the same things, but I'd have to believe some books do a better job at specific skills than others.